Strange very bright spots suddenly appeared?

  • So I was working on a modell in sketchup and turned Enscape to have a look at how the textures come together. Then I realized that on the corner between a wall and a floor these really bright spots have appeared? They weren't there 1 hour ago, I have no lamps or artificial lighting that could point there and the texture I am using is not newly imported into the model ( so it cannot be that ) Any ideas how something like that could happen and how to get rid of it are really welcome!

    Edit: I tried the older version ( before the one from the 23rd of January ) but that did not fix it. I also opened older versions of the model itself, still the same problem. Really strange...

    Edit 2: Robertpolk suggested to put the model in a huge box. That did fix the problem for anyone wondering. I will continue to examine the wall and edit again if I find another solution!

  • How thick are your walls and flooring? Have they the same material on both sides? What is modeled behind the wall and under it? Does the wall actually sit on the floor slab or just touch it's edge? What lighting/sunlight/exposure settings are you using?

  • How thick are your walls and flooring? Have they the same material on both sides? What is modeled behind the wall and under it? Does the wall actually sit on the floor slab or just touch it's edge? What lighting/sunlight/exposure settings are you using?

    Hi! Walls are 30cm thick, same material on all sides yes. There is the street behind the wall, under it is nothing ( I tried to make a new area under the wall the problem remained ) . No artificial lighting - only sun. Sunlight is standart at 100, tried different settings no change, same with the exposure. The only time the problem goes away is if I set rendering quality to Draft which makes me think it is some kind of strange reflection only there is actually nothing to reflect from :/. Maybe I should try to move the whole model a bit?

  • Just for clarification: by "both sides" I mean inside and out rather than front and back.


    The only time I have seen this is when light bounces from the ground plane through an edge where two surfaces meet or the inside face is a different material from the outside face (or even 'default' rather than the face fill). Sometimes the bump on the surface at an edge can do similar or if the edges don't quite touch (a very easy mistake to make when drawing in SU: you think it's snapped to a corner and it's fraction of a mm out.)


    What happens if you set the time to night?

  • Just for clarification: by "both sides" I mean inside and out rather than front and back.


    The only time I have seen this is when light bounces from the ground plane through an edge where two surfaces meet or the inside face is a different material from the outside face (or even 'default' rather than the face fill). Sometimes the bump on the surface at an edge can do similar or if the edges don't quite touch (a very easy mistake to make when drawing in SU: you think it's snapped to a corner and it's fraction of a mm out.)


    What happens if you set the time to night?

    Yes inside and out is what I mean as well by both sides :)

    If the sun is shining on the other side of the building ( that is East ) the problem goes away. I tried to make an extra element that overlaps the edge where Wall and Floor meet, it looks even stranger - appears to be self illuminated

  • It looks like a light leak, incomplete joint between the flooring and wall. 3dsmax also does this. I recently had an issue on an interior rendering and Micha suggested putting my model in a large enclosed "box". It worked and eliminated my issue. If there is no exterior light reaching this portion of your model you could try that, otherwise the joint between the 2 will need to be examined. It does look almost like a reflection though, you are right.

  • It looks like a light leak, incomplete joint between the flooring and wall. 3dsmax also does this. I recently had an issue on an interior rendering and Micha suggested putting my model in a large enclosed "box". It worked and eliminated my issue. If there is no exterior light reaching this portion of your model you could try that, otherwise the joint between the 2 will need to be examined. It does look almost like a reflection though, you are right.

    Hello! Putting a huge box around the model sorted it out yes, the light spots are gone. However, it is not really a solution for me because I am rendering a video that moves outside and inside the whole time. But at least it is something I could possibly work around if I don't manage to fix it any other way - thank you very much that was really helpful!

  • Hey archidoge , even though this behavior is resolvable by putting a box around the model, is there any chance you could send me the project file or part of the project which includes this light leaking at hand for troubleshooting purposes? We'd gladly have a look at this ourselves. Thanks a lot for your consideration! :)


    Also, if you haven't already, could you place a non-transparent wall right behind the initial wall, like this (which shouldn't be as obtrusive compared to a whole box around the model):


    Does this perchance help?